Motion transmitting and reversing gear.



PATENTE-D JULY 26, 1905. A. MARKMAN; MOTION TRANSMITTING AND REVERSINGGEAR. APPLICATION TILED DBO 19 1903 a SHEETS-$11321 1.

No. 795,530. PATENTED JULY 25, 1905. A. MARKMAN.

MOTION TRANSMITTING AND REVBRSING GEAR.

APPLICATION FILED 10150.19. 1903.

3 SHEETS-SHEET 2 PATENTED JULY 25, 1905.

A. MARKMAN. MOTION TRANSMITTING AND REVERSING GEAR.

APPLICATION FILED DEC.19, 1903.

3-BHEETS-SHEBT 3.

Wbbnweeo aou UNITED STATES PATENT OFFICE.

MOTION TRANSMITTING AND REVERSING GEAR.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed December 19, 1903, Serial No. 185,810.

T at whom it may concern:

Be it known that I, ANTON MARKMAN, a citizen of the United States,residing in Jersey City, in the county of Hudson and State of NewJersey, have invented certain new and useful Improvements in MotionTransmitting and Reversing Gears, of which the following is aspecification.

This invention relates to means for transmitting motion especiallyadapted for use with engines of motor-vehicles where the engine will notstart under load, but must be run free until brought up to speed andthen gradually connected with the driving-wheels.

The object of the invention is to provide an improved means fortransmitting motion from a shaft running at a certain speed to anothershaft or gear, whereby the latter will rotate either at a differentspeed or the same speed or else will rotate in a reverse direction; andfor this purpose the invention consists of a motion transmitting andreversing gear of which the novel features and combinations of partswill be clearly described in the following specification and recited inthe appended claims.

In the accompanying drawings, Figure 1 is a plan view of my improvedmotion transmitting and reversing gear arran ed on a motor-vehicle. Fig.2 is a vertica transverse section on line 2 2, Fig. 3. Fig. 3 is avertical longitudinal section on line 3 3, Fig. 4. Fig. 4 is an end viewwith the head of the casing removed; and Fig. 5 is a vertical transversesection on line 5 5, Fig. 3.

Similar characters of reference indicate corresponding parts.

In the drawings, 12 is the main shaft of my improved motion transmittingand reversing gear, which shaft is connected with the crank-shaft 56 ofthe explosion or other motor by a coupling, one member, 55, of which isattached to the crank-shaft 56 and the other member, 13, to the mainshaft 12 of the trans mitting-gear. To the shaft 12 is keyed a gear 14,and between this gear and the coupling 13 55 is located a loose sleeve15, which is provided at its inner end with a gear-wheel 17 adjacent tothe gear-wheel 14 and at its middle portion with a bevel-gear l6,suitably keyed thereto, said bevel-gear meshing with a bevel-gear 50 onan intermediate shaft 51, that leads from the main shaft 12 to the rearaxle 52 and imparts rotary motion to the same by bevel-gear transmission53 54, as shown in Fig. 1. On the sleeve 15 is mounted between the gears16 17 a disk 18, which is provided with a circumferential flange, saiddisk being adapted to turn loosely on the sleeve 15, but being heldagainst longitudinal shifting motion by the gear 17 and the hub of thebevel-gear 16. Adjacent to the gear-wheel 14 is placed loosely on theshaft 12 a gearwheel 21, on the hub ofwhich is placed a second disk 20,which is of slightly less diameter than the disk 18 and is provided witha circumferential flange extending in opposite direction to the flangeof the latter disk. The disks 18 and 20 are connected at diametricallyopposite points by short shafts 19, which are provided with shouldersadjacent to said disks and with ends of smaller diameter that passthrough the holes of the disks 18 and 20 and are secured to the same byscrew-nuts turned home on the threaded ends of the shafts 19, as shownclearly in Fig. 3. On each of the shafts 19 is placed a loose sleeve 22,to which are key ed alongside of each other gears 23, 24, and 25, thegear 23 meshing with the gear 17, the gear 24 meshing with the gear 14,and the gear 25 meshing with the gear 21. The gear 24 is lar er than thegear 14, while the gear 23 is smaIler than the gear 17, with which it isin mesh.

The hub of the gear 21 is provided with an exterior screw-thread,to'which is screwed a disk 34, which is also provided, like the disk 18,with a circumferential flange, the disk 34 being of the same diameter asthe disk 18. The disks 18, 20, and 34 and the gears arranged between thesame are inclosed by a cylindrical casing 26, which is provided withstationary heads 27 and 28, the hubs 29 and 30 of which formjournal-bearings for a conesleeve 48 at one end of the shaft and for thehub of the bevel-gear 16 near the opposite end of the main shaft 12. Thecasing 26 is attached at its lower part to a stationary base-plate 26*.At one end of the casing 26 are arranged in contact with thecircumferential flange of the disk 18 a number of friction-blocks 33 ofa brake 31, the band of which passes around the flange of said disk andhas its ends pivoted to a lever 32 at opposite sides of its fulcrum,which is located in an upward extension of the casing 26, as shown inFigs. 3, 4, and 5. When the lever 32 is actuated, the brake-band will becontracted and the friction-blocks 33 applied to the flanged disk 18, soas to grip the same tightly and prevent it from rotating under theinfluence of the rotary shaft 12 and the transmitting-gears. The flangeddisk 34 is also engaged by a brake, which comprises a brakeband similarto that of the brake acting on the disk 18, said brake comprising afulcrumed lever 35, a brake-band 36, pivoted thereto at opposite sidesof its fulcrum, and friction-blocks 37, which are applied to thebrake-band in the same manner as the friction-blocks 33 of the brake 31.

To the disk 34 is secured a ring 40 by a bolt 41 at the lower part ofthe same, said ring being split at a point diametrically opposite to thebolt 41 and engaged by the llattened part 42 of a bolt 43, that ispivoted to the disk 34 and passes through a hole of the same. An arm 44is placed loosely on the bolt 43 and adjustably connected therewith by ashort crank 45, that is keyed to the end of the bolt 43, said crankbeing provided with an adjusting-screw 46, that passes through it andthat is tapped into the arm 44. The free lower end of the arm 44 carriesa concave roller 47, that bears on the conical end of the sleeve 48,that is placed loosely on the shaft 12. The sleeve 48 is provided at itsouter end, outside of the journal-bearing 29 of the head 27, with acircumferential groove, that is engaged by the forked end of a lever 57,that is fulcrun'ied to'the head 27, as shown in Fig. 1.. W hen theconesleeve 48 is moved inwardly by the lever 57, it will move the arm 44in upward direction and expand the ring 40 by reason of the flat part 42of the bolt 43 being interposed between the split ends of the ring 40.The ring is provided with friction-blocks 49, of fibrous material, whichare seated in recesses of the ring 40 and serve to bind tightly againstthe inner circumference of the flanged disk 20 when the ring 40 isexpanded.

lVhen it is desired to rotate the rear axle at the same high speed asthe crank-shaft of the motor, the cone-sleeve 48 is moved inwardly, soas to apply the blocks of the friction-ring 40 and lock them to theinner circumference of the flanged disk 20. As the disk 34 is rigidlyconnected with the gear 21, this gear will be held stationary inrelation to the disk 20 and the disk 18, which is connected by theshafts 19 to the disk 20. Consequently the three gears on the shortshafts 19 will be prevented from rotating on the shafts, and therotation of the gear 14 will cause the disk 18 to be carried around asif it were fast on the shaft 12. As the gears 24 mesh with the gear 14and the gear 27 meshes with the gear 17, the latter will be rotated alsowith the shaft, so that the bevel-gear 1.6

on the sleeve of the gear-wl'ieel 17 will rotate at the same speed asthe shaft, and consequently transmit the speed of the motor or highspeed to the rear axle. lVhen the motion of the rear axle is to bearrested, the cone-sleeve is withdrawn by the action of the lever 57, sothat the arm 44, with its roller 47,

is permitted to drop down and. release thereby the expanding action. onthe split end of the ring 40, so that instantly the clutch action on thedisk 20 is released and the transmission of motion to the bevel-gear 30and the rear axle interrupted.

When it is desired to reduce the speed of the rear axle 52, the lever 32is actuated and the brake applied to the disk 18. This ac tion will holdthe disk 18 in stationary position, so that the rotation of the shaft 12and gear 14 will cause the gear 24 to rotate and transmit by the gears23 and 17 rotary motion to the wheel 15 and bevel-gear 16 and from thesame to the rear axle. As the gear 24 is larger than the gear 14 and thegear 17 larger than the gear 23, the speed of the wheel 15 andbevel-gear 1.6 is considerably reduced, and thereby slow speed. impartedto the rear axle. When the brake is released from the disk 18, theresistance offered to the bevel-gear 16 will tend to retain the same infixed position, so that the gears 14 and 24 will cause the gears 23 tohave an epicycloidal movement around the gear 17, while the disk 18 willrotate slowly in the opposite direction without transmitting motion tothe bevelgear 16, so that consequently no motion is transmitted to therear axle.

When it is desired to reverse the motion of the rear axle, the lever 25is actuated, and thereby the brake applied to the circumferential flangeof thedisk 34. This will lock the disk 34, so that consequently the gear2]. will be held in fixed position, while the rotation of the gears .14and 24 will cause the gear 25 to describe an epicycloidal movementaround the gear 21, so that the disk 18 will rotate in an oppositedirection to the rotation of the shaft 12 and gear 14, as the gears 23are smaller than the gears 25, while the gear 17, around which the gears23 rotate, is larger than the narrow stationary gear 21, the gear 17will rotate in the same direction as that in which the carrying member18 is rotatingthat is to say, it will be slowly rotated in a directionopposite to that of the shaft 12, so that the bevel-gear 16 will reverseby the intermediate transmittingshaft the motion of the rear axle 52. Onreleasing the brake operated by the lever 35 the slow reversing motiontransmitted to the rear axle is interrupted, all the gear-wheels on theshafts 19 rotating then around. the gear-wheel 14 without transmittingany mo tion to the bevel-gear 16.

All. the interior parts except the conesleeve 48 and the bevel-gear 16are inside of the casing and run in oil, which is admitted by anoil-hole in the top of the casing, closed by a screw-plug 58, all theworking parts be ing thereby thoroughly lubricated and protected fromdust and dirt and against undue friction and wear of the parts. Byactuating the levers 57, 32, and 35 as required either high speed or lowspeed is transmitted to the rear axle or the motion of the samereversed, all the parts working easily in a reliable manner by theactuations of these levers.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a motion transmitting and reversing device, thecombination, with a main shaft, of a gear fixed thereon, sleevesrotatable on said shaft, gears on each of said sleeves, a bevel-gearkeyed to the outer end of one of said rotatable sleeves, a carryingmember comprising spaced disks rotatable on said shaft-sleeves andprovided with peripheral outwardly-extending flanges, stud-shaftsbetween said disks, gears carried by said studshafts and meshing withsaid shaft-gear and the gears on said shaft-sleeves, a third disk inproximity to one of the disks of said carrying member and fixed to oneof said shaft-sleeves, said third disk being also provided with anoutwardly extending peripheral flange, a friction-clutch carried by saidthird disk for looking it into engagement with the contiguous disk ofthe carrying member, brakes engaging the outwardly-extending flanges ofthe opposite disk of the carrying member and of said third disk, andmeans for actuating the different brakes and clutch so as to transmithigh or slow speed to the main shaft in one direction or slow speed inthe opposite direction.

2. In a motion transmitting and reversing device, the combination, witha main shaft,

of a drive-gear fixed thereon, sleeves rotatable on said shaft, gears oneach of said sleeves, a bevel-gear keyed to the outer end of one of saidsleeves, a carrying member comprising spaced disks rotatable on saidshaft-sleeves and provided with peripheral outwardly-extending flanges,stud-shafts extending between said disks, triple gears turning looselyin said stud-shafts and meshing with the drive-gear on the main shaftand with the gears on said shaftsleeves, a third disk in proximity toone of the disks of said carrying member also provided With a peripheralflange extending in the same direction as the flange on the adjacentdisk, a friction-clutch carried by said third disk for locking the sameinto engagement with the adjacent disk of the carrying member, brakesengaging the outwardly-extending flange of the opposite disk of thecarrying member and the flange of said third disk, means for actuatingsaid brakes and clutch, and a casing surrounding said disks and internaltransmitting-gears and having heads provided respectively withjournal-casings for the exterior bevel-gear and the actuating mechanismof the frictionclutch supported on said third disk.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

ANTON MARKMAN.

Witnesses 2 PAUL GOEPEL, HENRY J. SUI-IRBIER.

